Conveyor device for conveying food products
A conveyor device for conveying food products on a plurality of parallel conveyor tracks and for formatting the food products in a specific product format, especially for conveying and formatting stacks or interleaved units made of a plurality of slices of cheese or meat products is provided. The conveyor device fills a product gap on one of the conveyor tracks incoming on the input side with a food product so that on the output side all parallel conveyor tracks are supplied with the food products when a product gap is sensed. A corresponding method is also provided.
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This present application is a divisional application of U.S. Non-Provisional patent application Ser. No. 16/058,078, filed, Aug. 8, 2018, which is a continuation of U.S. Non-Provisional patent application Ser. No. 14/628,434, filed Feb. 23, 2015, now U.S. Pat. No. 10,065,757, which claims the priority benefit of German Patent Application No. 10 2014 002 530.6, filed Feb. 24, 2014, all of which are incorporated by reference herein.
FIELD OF THE DISCLOSUREThe invention relates to a conveyor device for conveying food products on a plurality of parallel conveyor tracks and for formatting the food products in a specific product format, especially for conveying and formatting stacks or interleaved units made of a plurality of slices of cheese or meat products.
BACKGROUNDKnown from EP 2 420 363 A1 is a slicer that makes it possible to slice food products (e.g. salami, ham, cheese) into slices, wherein the slicer conveys the food products to be sliced through the slicing device on a plurality of parallel conveyor tracks, then slices them and outputs them on the output side. The conveying speed and thus the advance of the individual food products may be adjusted separately for the individual conveyor tracks.
During the slicing process, the slicing device 1 initially outputs on the output conveyor 2 pairs A-B, C-D, E-F, and G-H of the food products A-K so that initially the two conveyor tracks 3, 4 are supplied with two adjacently disposed food products. The feeder 6 is able to process this product format with two adjacently disposed food products with no problem.
However, normally during a slicing process product gaps 9 occur in one of the two conveyor tracks 3, 4 for the slicing device 1.
One possible cause of the product gaps 9 is that the food product to be sliced that is on the conveyor track 4 was shorter prior to being sliced than the food product to be sliced that is on the conveyor track 3 so that the food product on the conveyor track 4 is used up earlier than the food product on the conveyor track 3, which then leads to product gaps 9. This cause of the product gaps 9 is relevant for instance if the products in question are natural products (e.g. ham) that do not have a defined length but whose lengths instead are subject to natural fluctuations.
Another potential cause of product gaps 9 is that the slicing device 1 slices the food products in the two conveyor tracks 3, 4 with a different slice thickness.
Another potential cause of the product gaps 9 is that the portion sizes of the food products A-K or B-H in the two conveyor tracks 3 and 4 are different in size. For instance, if the food products B-H in the left-hand conveyor track 4 are for instance stacks of meat slices having a total weight of 200 grams each, that food product will be finished earlier than in the right-hand conveyor track 3, if the individual food products A-K there are stacks of slices having a total weight of 100 grams each.
Regardless of the various possible causes of the product gaps 9, the product format at the input to the feeder 6 then no longer meets the requirements of the feeder 6, because the latter expects that the two conveyor tracks 7, 8 of the input conveyor 5 for the feeder 6 both have food products, In contrast, a product gap in one of the two conveyor tracks 7, 8 at the input for the feeder 6 can lead to problems.
SUMMARYThe underlying object of the invention is therefore to prevent such product gaps when food products are sliced on a plurality of parallel conveyor tracks having separately adjustable conveyor speeds.
This object is attained using an inventive conveyor device and a corresponding method in accordance with the independent claims
The invention includes the general technical teaching of filling with food products any product gaps on one of the conveyor tracks at the output of a slicing device so that when possible both conveyor tracks are always supplied with food products at the output of the slicing device.
The invention therefore provides a conveyor device that is arranged downstream of the slicing device, in the conveying direction, and thus transfers sliced food products (e.g. stacks of sliced cold cuts) to a plurality of parallel conveyor tracks.
The food products may be for instance slices of cold cuts, ham, salami, or cheese; however, the invention is not limited to these food products but rather may also be realized with other food products.
It should also be noted that the slicing device may provide the food products for instance as stacks or interleaved units made of a plurality of slices. However, the invention is not limited to stacks or interleaved units in terms of how product supplied by the slicing device is presented, but rather may also be realized with product being presented in another manner. For instance, the individual slices may also be arranged in a circle or oval. Moreover, it is possible within the context of the invention for the individual slices to be offset or interleaved. It is furthermore possible for the individual slices to be folded. Such product presentations are known per se from the prior art and therefore do not require more detailed description.
The inventive conveyor device now ensures that any product gaps on one of the parallel conveyor tracks are filled with a food product so that at the output side all parallel conveyor tracks are supplied with the food products. The inventive conveyor devices thus provides on the output side a product format that comprises a plurality of parallel food products (e.g. stacks of slices). This is advantageous because such a product format is important for a downstream feeder for product packaging.
If there is an even number of product gaps on one of the conveyor tracks, the product gap may be filled with an excess food product from the other conveyor track with nothing further. For instance, if the right-hand conveyor track includes eight food products (e.g. stacks of slices), while the left-hand conveyor track contains only six food products (e.g. stacks of slices), one food product may be transferred from the right-hand conveyor track to the left-hand conveyor track so that then both conveyor tracks each include food products one after the other. The result is thus that all of the conveyor tracks are supplied with food products at the output of the inventive conveyor device.
However, if there is an odd number of product gaps in one of the conveyor tracks, this manner of filling the product gaps is not adequate for ensuring that all of the conveyor tracks are supplied with food products at the output of the conveyor device. For instance, if the right-hand conveyor track includes eight food products (e.g. stacks of slices), while the left-hand conveyor track includes only five food products (e.g. stacks of slices), one of the three product gaps in the left-hand conveyor track may be supplied with one food product from the right-hand conveyor track. As a result, the right-hand conveyor track then includes seven food products one after the other, while the left-hand conveyor track includes only six food products and still has a product gap. For such cases, the inventive conveyor device preferably has one product buffer that includes at least one food product so that the remaining product gap in the left-hand conveyor track may then be filled with one of the food products in the product buffer.
The product gaps in one of the conveyor tracks are thus first filled with food products from the other conveyor track when this is possible. The food products held ready in the product buffer are then preferably used for filling product gaps only if this should be necessary because the number of product gaps in one of the conveyor tracks is uneven.
However, it would also be possible in principle in the context of the invention for the product gaps in one of the conveyor tracks to be filled only from the product buffer. Furthermore, in principle it is also possible for the product gaps in one of the conveyor tracks to be filled only with food products from the other conveyor tracks. Preferably, however, the two manners of filling product gaps explained in the foregoing are combined with one another.
In one preferred exemplary embodiment of the invention the conveyor device has a distributor conveyor that selectively distributes the food products incoming on the input side to a main flow or to the product buffer.
The product buffer is formed by a buffer conveyor that is supplied with the food products by the distributor conveyor. The distributor conveyor preferably conducts the food products incoming on the input side onto buffer conveyor until the buffer conveyor is filled. This is advantageous because then there is always sufficient food products on the buffer conveyor for filling product gaps in one of the conveyor tracks. When a buffer conveyor is completely or adequately filled, however, the distributor conveyor preferably conducts the food products incoming on the input side into the main flow to a downstream main flow conveyor. In the preferred embodiment, the main flow conveyor does not have to be supplied with food products only by the distributor conveyor, however, but instead may also be supplied by the buffer conveyor if this should be necessary for filling product gaps.
Moreover, the inventive conveyor device has a transfer device that can transfer food products between the parallel conveyor tracks for filling product gaps.
In the preferred exemplary embodiment, the transfer device is a so-called shuttle conveyor that may be displaced as a whole transverse to the direction of conveyance in order to displace between the conveyor tracks the food products incoming on the input side of the shuttle conveyor. The shuttle conveyor therefore as a rule has a wider conveyor width than the other components of the conveyor device so that the shuttle conveyor, regardless of its displacement position transverse to the direction of conveyance, always covers the entire width of the other conveyor belt.
However, alternatively it is also possible for a transfer robot to be employed as the transfer device and for it to be able to pick up a food product from the conveyor belt and to put it down again on another conveyor track. Such transfer robots are known per se from the prior art and therefore need not be described in greater detail.
It has already been mentioned that the distributor conveyor can selectively conduct the food products (e.g. stacks of slices) that are incoming on the input side to the buffer conveyor or to the main flow conveyor. This distribution preferably occurs using a vertical pivot movement by the distributor conveyor, which enables a rapid change. The output end of the distributor conveyor is therefore preferably vertically adjustable between the buffer conveyor and the main flow conveyor in order to selectively supply the buffer conveyor or the main flow conveyor with the food products incoming on the input side.
The buffer conveyor is preferably disposed above the main flow conveyor and its output end may likewise be adjusted vertically.
If a product gap must be filled with a food product from the buffer conveyor, the output end of the buffer conveyor may be lowered to the main flow conveyor in order to place one of the food products from the buffer conveyor on the main flow conveyor for subsequently filling a product gap.
In contrast, if no product gap needs to be filled, the output end of the buffer conveyor is raised from the main flow conveyor so that the main flow of the food products may then be advanced on the main flow conveyor undisturbed by the buffer conveyor.
In the preferred exemplary embodiment of the invention, the conveying speed of the individual conveyor tracks with the buffer conveyor may be adjusted separately from one another. This is important so that a single food product may be transferred from only one of the conveyor tracks of the buffer conveyor onto the main flow conveyor. To this end, a conveyor track of the buffer conveyor is then activated and then conveys the food product therefrom, while the other conveyor tracks of the buffer conveyor do not move.
Moreover, a transfer conveyor having a plurality of parallel conveyor tracks is preferably provided, wherein the transfer conveyor is arranged, in the direction of conveyance, downstream of the transfer device (e.g. shuttle conveyor, transfer robot) and is supplied with food products by the transfer device. What is important here is that even for the transfer conveyor the conveying speed of the individual conveyor tracks may be adjusted separately from one another in order to transfer only one individual food product to only one of the conveyor tracks.
To avoid misunderstanding, it is hereby noted that the term conveyor track used in the context of the invention means a conveyor track that is wide enough to receive a food product. In a conveyor having three parallel conveyor tracks, therefore, three food products may be conveyed adjacent to one another. In contrast, the term conveyor track does not as a rule imply that the conveying speed of the conveyor track is individually adjustable. Thus within the context of the invention there must be a differentiation between conveyors having a plurality of conveyor tracks with a uniform conveying speed, on the one hand, and conveyors having a plurality of conveyor tracks, each with separately adjustable conveying speeds, on the other hand. The conveying speeds of the individual conveyor tracks are preferably separately adjustable for the buffer conveyor and for the transfer conveyor. In contrast, the individual conveyor tracks in the other conveyors preferably have a uniform conveying speed.
With regard to the transfer conveyor, it should also be noted that the latter may also be arranged in a device downstream, such as for instance in a feeder, as will be described in detail hereinafter.
It should furthermore be noted that the inventive conveyor device preferably has at least one product sensor that at the input of the conveyor device detects the product supply in the individual conveyor tracks individually for each of the conveyor tracks. Such product sensors may function for instance by means of a camera, an ultrasound sensor, or using mechanical scanning, but the invention is not limited to these principles for the functioning of the product sensor.
The inventive conveyor device furthermore preferably includes a control unit that is connected at the input side to the product sensors in order to detect the supply of the conveyor tracks at the input to the conveyor device. Moreover, the control unit controls the following actions of the conveyor device on the output side:
the pivot movement of the distributor conveyor,
the pivot movement of the buffer conveyor,
the conveying speed of the individual conveyor tracks of the buffer conveyor,
the transverse displacement of the shuttle conveyor or the transfer movement of the transfer robot,
the conveying speed of the individual conveyor tracks of the transfer conveyor,
the conveying speed of the main flow conveyor, and,
the conveying speed of the distributor conveyor.
The aforesaid actions are controlled such that as many product gaps as possible in the conveyor tracks are filled at the output.
It should furthermore be noted that the invention is not limited to the conveyor device described in the foregoing as an individual device. On the contrary, the invention also claims protection for a complete processing line for processing the food products having a slicing device, the inventive conveyor device, and a feeder for placing the food products in packaging.
Finally, the invention also includes a corresponding method for product formatting of food products on a conveyor device, wherein the individual method steps proceed from the description in the foregoing, so that no separate description of the individual method steps shah be provided here.
Other advantageous refinements of the invention are characterized in the subordinate claims or are explained in greater detail in the following, using the figures, together with the description of the preferred exemplary embodiments of the invention.
The inventive conveyor device includes a plurality of conveyors that have different functions, specifically a distributor conveyor 11, a buffer conveyor 12, a main flow conveyor 13, a shuttle conveyor 14, and an output conveyor 15, wherein the food products are conveyed by the conveyor device 10 in the direction of the block arrow shown in
The distributor conveyor 11 transfers the food products incoming on the input side from the output conveyor 2 for the slicing device 1 and selectively forwards the incoming food products to the buffer conveyor 12 or to the main flow conveyor 13. To this end, the output end 16 of the distributor conveyor 11 may be pivoted vertically between the buffer conveyor 12 disposed above and the main flow conveyor 13 disposed below. The distributor conveyor 11 may thus be pivoted about a pivot axis 17 in the direction of the double arrow. The pivot movement by the distributor conveyor 11 is driven by a drive shaft 18 that projects laterally from a housing 19 of the conveyor device 10 and may be driven by an electric motor, for instance.
In addition, the conveyor device 10 also has on its input side a plurality of sensors 24 that determine on the individual conveyor tracks 3, 4 whether the conveyor tracks 3, 4 are supplied with food products. This is important so that the product gaps in the conveyor tracks 3, 4 may subsequently be filled with food products.
The main flow conveyor 13 is arranged beneath the buffer conveyor 12 and conveys a main flow of the food products beneath the raised buffer conveyor 12.
The shuttle conveyor 14 is arranged downstream of the main flow conveyor 13 in the conveying direction, wherein the shuttle conveyor 14 may be displaced as a whole at a right angle to the conveying direction, as is indicated by the double arrow in
Arranged in the conveying direction downstream of the shuttle conveyor 14 is the output conveyor 15, which forwards the food products to the input conveyor 5 for the feeder 6. What is important here is that the input conveyor 5 for the feeder 6 has separately controllable conveyor tracks 7, 8 in order to be able to transfer the food products for the individual conveyor tracks 7, 8 independently of one another from the output conveyor 15 for the conveyor device 10.
The buffer conveyor 12 is arranged above the main flow conveyor 13, wherein the buffer conveyor 12 has an output end 20 that may be selectively lowered to the main flow conveyor 13 or raised from the main flow conveyor 13, as shall be described in detail in the following. The buffer conveyor 12 may thus be pivoted about a pivot axis 21 in the direction of the double arrow, wherein the pivot movement is driven via a drive shaft 22 and a lever structure 23. The drive shaft 22 for pivoting the buffer conveyor 12 projects laterally out of the housing 19 of the conveyor device 10 and is preferably also driven by an electric motor.
If a product gap on one of the conveyor tracks must be filled, the output end 20 of the buffer conveyor 12 is lowered to the main flow conveyor 13 so that a food product may be transferred from the buffer conveyor 12 to the main flow conveyor 13.
In contrast, if no product gap needs to be filled, the output end 20 of the buffer conveyor 12 is raised from the main flow conveyor 13 so that the main flow of food products on the main flow conveyor is not blocked.
The following describes how the inventive conveyor device 10 functions, referencing
For the purposes of simplification, the buffer conveyor 12 is depicted in the top-view depictions in accordance with
In the situation in accordance with
In the next operating situation in accordance with
In the situation in accordance with
Following this the distributor conveyor 11 is then pivoted downward to the main flow conveyor 13, whereupon the food products E, F are then conducted onto the main flow conveyor 13, as is illustrated in
In method steps 3F-3H, the food products E-K are then further conveyed to the shuttle conveyor 14 so that the food products E, F are then disposed on the shuttle conveyor 14, as is illustrated in
The food products E-K are then further conveyed via the shuttle conveyor 14 and the output conveyor 15, as is illustrated in
In method step 3L, the shuttle conveyor 14 is then displaced to the left with respect to the conveyor device, which causes the food product J to be transferred from the right-hand conveyor track to the left-hand conveyor track.
In addition, in the situation in accordance with
Following this the food products J, K, and B are then conveyed further via the shuttle conveyor 14, and the food product B on the shuttle conveyor 14 then fills the last product gap adjacent to the food product K on the output conveyor 15, as is illustrated in
The invention is not limited to the preferred exemplary embodiment described in the foregoing. On the contrary, a plethora of variants and deviations are possible that also make use of the inventive thought and therefore fall within the scope of protection. The invention also claims in particular protection for the subject and the features of the subordinate claims, regardless of the claims referenced. It is therefore also possible within the context of the invention to realize the subject of the main claim without all of the features of the main claim, but with some features from the subordinate claims.
REFERENCE LISTA-K Food products
1 Slicing device
2 Output conveyor for the slicing device
3 Right-hand conveyor track of the output conveyor for the slicing device
4 Left-hand conveyor track of the output conveyor for the slicing device
5 Input conveyor for the feeder
6 Feeder
7 Right-hand conveyor track of the input conveyor for the feeder
8 Left-hand conveyor track of the input conveyor for the feeder
9 Product gaps
10 Conveyor device
11 Distributor conveyor
12 Buffer conveyor
13 Main flow conveyor
14 Shuttle conveyor
15 Output conveyor
16 Output end of the distributor conveyor
17 Pivot axis of the distributor conveyor
18 Drive shaft for pivoting the buffer conveyor
19 Housing
20 Output end of the buffer conveyor
21 Pivot axis of the buffer conveyor
22 Drive shaft for pivoting the buffer conveyor
23 Lever structure for pivoting the buffer conveyor
24 Sensor
Claims
1. A conveyor device configured to convey food products and to format the food products in stacks or shingles of a plurality of slices of cheese or meat products, comprising:
- a plurality of parallel, individual first conveying tracks;
- a plurality of product sensors, wherein respective product sensors are configured to detect a supply of food product on each first conveyor track;
- a distributor conveyor downstream of the first conveying tracks;
- a shuttle conveyor downstream of the distributor conveyor;
- a buffer conveyor downstream of the first conveying tracks;
- a main flow conveyor configured to convey a main flow of the food products and is selectively loaded with the food products from the distributor conveyor or from the buffer conveyor, the main flow conveyor being downstream of the distributor conveyor, wherein the shuttle conveyor is downstream of the main flow conveyor;
- a plurality of parallel, individual second conveying tracks downstream of the shuttle conveyor and the buffer conveyor,
- wherein at least one of the shuttle conveyor and the buffer conveyor fill product gaps in one of the second conveying tracks when a product gap is detected by one of the products sensors.
2. A conveyor device configured to convey food products and to format the food products in stacks or shingles of a plurality of slices of cheese or meat products, comprising:
- a plurality of parallel, individual conveying tracks;
- a plurality of product sensors, wherein respective product sensors are configured to detect a supply of food product on each conveyor track;
- a shuttle conveyor, which as a whole is displaceable transversely to a conveying direction of the conveying tracks, wherein when an even number of product gaps in one of the conveying tracks is detected, the shuttle conveyor fills the product gaps with a corresponding number of food products from another conveyor track by transferring at least one of the food products from the conveyor track without product gaps into the conveyor track with the product gaps; and
- a product buffer, wherein when an odd number of product gaps in one of the conveying tracks is detected, the product gaps are also filled with food products by transferring at least one of the food products from the product buffer into the conveying track with the product gap.
3. The conveyor device according to claim 2, further comprising
- a distributor conveyor configured to distribute incoming food products;
- wherein the product buffer is a buffer conveyor, the buffer conveyor configured to be fed food products by the distributor conveyor;
- a main flow conveyor configured to convey a main flow of the food products and is selectively loaded with the food products from the distributor conveyor or from the buffer conveyor, the main flow conveyor being arranged in the conveying direction downstream of the distributor conveyor; and
- wherein the shuttle conveyor is arranged in the conveying direction downstream of the main flow conveyor.
4. The conveyor device according to claim 3, wherein the distributor conveyor is vertically adjustable and having an output end between the buffer conveyor and the main flow conveyor in order to selectively feed the buffer conveyor or the main flow conveyor with food products.
5. The conveyor device according to claim 3, wherein a conveying speed of the individual conveying tracks can be set separately from one another.
6. The conveyor device according to claim 3, further comprising
- a slicing device configured to cut food products, the slicing device outputting the cut food products onto the parallel conveying tracks; and
- a feeder configured to load the cut and formatted food products into packaging, the feeder being arranged downstream of the shuttle conveyor in the conveying direction.
7. The conveyor device according to claim 3, further comprising an output conveyor having a plurality of parallel conveying tracks, the output conveyor being downstream of the shuttle conveyor in the conveying direction and being loaded by the shuttle conveyor with the food products, wherein a conveying speed of the individual conveying tracks in the shuttle conveyor being adjustable separately from one another in order to transfer only one individual food product in only one of the conveying tracks of the output conveyor.
8. The conveyor device according to claim 7, further comprising
- a slicing device configured to cut food products, the slicing device outputting the cut food products onto the parallel conveying tracks; and
- a feeder configured to load the cut and formatted food products into packaging, the feeder being arranged downstream of the output conveyor in the conveying direction.
9. The conveyor device according to claim 3, wherein the buffer conveyor is above the main flow conveyor and an output end thereof is vertically adjustable, the output end of the buffer conveyor can be lowered onto the main flow conveyor to deposit food products on the main flow conveyor for subsequent filling of a product gap, and the output end of the buffer conveyor can be raised from the main flow conveyor in order not to block the main flow of the food products along the main flow conveyor.
10. The conveyor device according to claim 9, wherein a conveying speed of the individual conveying tracks can be set separately from one another.
11. The conveyor device according to claim 2, further comprising
- a slicing device configured to cut food products, the slicing device outputting the cut food products onto the parallel conveying tracks; and
- a feeder configured to load the cut and formatted food products into packaging, the feeder being arranged downstream of the shuttle conveyor in the conveying direction.
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Type: Grant
Filed: Oct 25, 2019
Date of Patent: Oct 20, 2020
Patent Publication Number: 20200055623
Assignee: PROVISUR TECHNOLOGIES, INC. (Mokena, IL)
Inventor: Jürgen Bialy (Altenberge)
Primary Examiner: Mark A Deuble
Application Number: 16/663,943
International Classification: B65B 35/44 (20060101); B65B 25/06 (20060101); B65B 35/30 (20060101); B65B 35/54 (20060101); B65G 47/08 (20060101); B65G 15/24 (20060101); B65G 37/00 (20060101); B65G 43/08 (20060101); B65G 47/31 (20060101); B65G 47/32 (20060101);